1 /* ------------------------------------------------------------------ 2 * Copyright (C) 1998-2009 PacketVideo 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 13 * express or implied. 14 * See the License for the specific language governing permissions 15 * and limitations under the License. 16 * ------------------------------------------------------------------- 17 */ 18 #ifndef idct_h 19 #define idct_h 20 21 /*---------------------------------------------------------------------------- 22 ; INCLUDES 23 ----------------------------------------------------------------------------*/ 24 #include "mp4dec_lib.h" 25 26 /*---------------------------------------------------------------------------- 27 ; MACROS 28 ; Define module specific macros here 29 ----------------------------------------------------------------------------*/ 30 31 /*---------------------------------------------------------------------------- 32 ; DEFINES 33 ; Include all pre-processor statements here. 34 ----------------------------------------------------------------------------*/ 35 #define INTEGER_IDCT 36 37 #ifdef FAST_IDCT 38 #ifndef INTEGER_IDCT 39 #define INTEGER_IDCT 40 #endif 41 #endif 42 43 #ifdef FAST_IDCT 44 #ifdef __cplusplus 45 extern "C" 46 { 47 #endif 48 void idctrow0(int16 *blk, uint8 *pred, uint8 *dst, int width); 49 void idctrow1(int16 *blk, uint8 *pred, uint8 *dst, int width); 50 void idctrow2(int16 *blk, uint8 *pred, uint8 *dst, int width); 51 void idctrow3(int16 *blk, uint8 *pred, uint8 *dst, int width); 52 void idctrow4(int16 *blk, uint8 *pred, uint8 *dst, int width); 53 void idctcol0(int16 *blk); 54 void idctcol1(int16 *blk); 55 void idctcol2(int16 *blk); 56 void idctcol3(int16 *blk); 57 void idctcol4(int16 *blk); 58 59 void idctrow0_intra(int16 *blk, PIXEL *comp, int width); 60 void idctrow1_intra(int16 *blk, PIXEL *comp, int width); 61 void idctrow2_intra(int16 *blk, PIXEL *comp, int width); 62 void idctrow3_intra(int16 *blk, PIXEL *comp, int width); 63 void idctrow4_intra(int16 *blk, PIXEL *comp, int width); 64 #ifdef __cplusplus 65 } 66 #endif 67 #endif 68 69 /* this code assumes ">>" to be a two's-complement arithmetic */ 70 /* right shift: (-2)>>1 == -1 , (-3)>>1 == -2 */ 71 72 /* a positive real constant is converted to an integer scaled by 2048 */ 73 /* or equivalent to left shift by 11 */ 74 75 #define W1 2841 /* 2048*sqrt(2)*cos(1*pi/16) */ 76 #define W2 2676 /* 2048*sqrt(2)*cos(2*pi/16) */ 77 #define W3 2408 /* 2048*sqrt(2)*cos(3*pi/16) */ 78 #define W5 1609 /* 2048*sqrt(2)*cos(5*pi/16) */ 79 #define W6 1108 /* 2048*sqrt(2)*cos(6*pi/16) */ 80 #define W7 565 /* 2048*sqrt(2)*cos(7*pi/16) */ 81 #define W1mW7 2276 82 #define W1pW7 3406 83 #define W5mW3 -799 84 #define mW3mW5 -4017 85 #define mW2mW6 -3784 86 #define W2mW6 1568 87 88 /* left shift by 11 is to maintain the accuracy of the decimal point */ 89 /* for the transform coefficients (W1,...W7) */ 90 91 /*---------------------------------------------------------------------------- 92 ; EXTERNAL VARIABLES REFERENCES 93 ; Declare variables used in this module but defined elsewhere 94 ----------------------------------------------------------------------------*/ 95 96 /*---------------------------------------------------------------------------- 97 ; SIMPLE TYPEDEF'S 98 ----------------------------------------------------------------------------*/ 99 100 /*---------------------------------------------------------------------------- 101 ; ENUMERATED TYPEDEF'S 102 ----------------------------------------------------------------------------*/ 103 104 /*---------------------------------------------------------------------------- 105 ; STRUCTURES TYPEDEF'S 106 ----------------------------------------------------------------------------*/ 107 108 /*---------------------------------------------------------------------------- 109 ; GLOBAL FUNCTION DEFINITIONS 110 ; Function Prototype declaration 111 ----------------------------------------------------------------------------*/ 112 113 /*---------------------------------------------------------------------------- 114 ; END 115 ----------------------------------------------------------------------------*/ 116 #endif 117 118 119